Commit a6ccb48e authored by Pavel Begunkov's avatar Pavel Begunkov Committed by Jens Axboe
Browse files

io_uring/cmd: give inline space in request to cmds 



Some io_uring commands can use some inline space in io_kiocb. We have 32
bytes in struct io_uring_cmd, expose it.

Signed-off-by: default avatarPavel Begunkov <asml.silence@gmail.com>
Link: https://lore.kernel.org/r/7ca779a61ee5e166e535d70df9c7f07b15d8a0ce.1726072086.git.asml.silence@gmail.com


Signed-off-by: default avatarJens Axboe <axboe@kernel.dk>
parent 6746ee4c

include/linux/io_uring/cmd.h

+9 −0
Original line number Diff line number Diff line
@@ -23,6 +23,15 @@ static inline const void *io_uring_sqe_cmd(const struct io_uring_sqe *sqe) 
	return sqe->cmd;

}



static inline void io_uring_cmd_private_sz_check(size_t cmd_sz)

{

	BUILD_BUG_ON(cmd_sz > sizeof_field(struct io_uring_cmd, pdu));

}

#define io_uring_cmd_to_pdu(cmd, pdu_type) ( \

	io_uring_cmd_private_sz_check(sizeof(pdu_type)), \

	((pdu_type *)&(cmd)->pdu) \

)



#if defined(CONFIG_IO_URING)

int io_uring_cmd_import_fixed(u64 ubuf, unsigned long len, int rw,

			      struct iov_iter *iter, void *ioucmd);